<template>
  <div class="table">
    <div class="container">
      <div class="handle-box">
        <el-button type="primary" size="mini" @click="delAll">批量删除</el-button>
        <el-button type="primary" size="mini" @click="centerDialogVisible = true">添加歌曲</el-button>
        <el-input v-model="select_word" size="mini" placeholder="请输入歌曲名" class="handle-input"></el-input>
      </div>
    </div>

    <!-- 主界面 -->
    <el-table size="mini" ref="multipleTable" border style="width:100%" height=600px :data="tableData" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="40"></el-table-column>
      <el-table-column prop="name" label="歌手-歌名" align="center"></el-table-column>   
      <el-table-column label="操作" align="center">
        <template slot-scope="scope">
          <el-button size="mini" type="danger" @click="handleDelete(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 添加歌曲界面 -->
    <el-dialog title="添加歌曲" :visible.sync="centerDialogVisible" width="400px" center >
      <el-form :model="registerForm" ref="registerForm" label-width="80px" action="" id="tf">
        <el-form-item prop="singerName" label="歌手名字" size="mini">
          <el-input v-model="registerForm.singerName" placeholder="歌手名字"></el-input>
        </el-form-item>
        <el-form-item prop="songName" label="歌曲名字" size="mini">
          <el-input v-model="registerForm.songName" placeholder="歌曲名字"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button type="primary" size="mini" @click="getSongId">确认</el-button>
        <el-button size="mini" @click="centerDialogVisible = false">取消</el-button>
      </span>
    </el-dialog>

    <el-dialog title="删除歌单" :visible.sync="delVisible" width="300px" center>
      <div align="center">删除不可恢复，是否确认删除</div>
      <span slot="footer">
        <el-button type="primary" size="mini" @click="deleteRow">确认</el-button>
        <el-button size="mini" @click="delVisible = false">取消</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import { mixin } from '../mixins/index';
import { listSongDetail,listSongAdd,delListSong,songOfSongId,songOfSongName } from "@/api/index"
export default {
  mixins: [mixin],
  name: '',
  components: {},
  props: {},
  data () {
    return {
      centerDialogVisible: false, // 添加弹窗是否显示
      delVisible: false,          // 删除弹窗是否显示
      registerForm: {             // 添加框
        singerName: '',           // 歌手名字
        songName: ''              // 歌曲名字
      },
      tableData: [], // 歌单数据表
      tempData: [], // 根据歌单名搜索时用的歌单数据表
      select_word: '', // 搜索的歌单名
      idx: -1, // 当前选择的歌单
      multipleSelection: [],   //哪些项已经打勾
      songListId: ''   //歌单id
    }
  },
  computed: {},
  watch: {
    //搜索框里面的内容发生变化的时候，搜索结果table列表的内容跟着它的内容发生变化
    select_word: function() {
      if(this.select_word == ''){
        this.tableData = this.tempData;
      } else {
        this.tableData = [];
        for(let item of this.tempData) {
          if(item.name.includes(this.select_word)){
            this.tableData.push(item);
          }
        }
      }
    }
  },
  created () {
    this.songListId = this.$route.query.id; // 歌单传过来的 歌单id
    this.getData();
  },
  methods: {
    // 获取全部歌曲
    getData() {
      this.tableData = [];
      this.tempData = [];
      listSongDetail(this.songListId)
      .then(res =>{
        for(let item of res){
          songOfSongId(item.songId)
          .then(res => {
            this.tempData.push(res);
            this.tableData.push(res);
          })
          .catch(err =>{
            console.log(err);
          })
        }
      });
    },
    //添加歌曲前的准备，获取到歌曲id        
    getSongId(){
      let _this = this;
      var songOfName = _this.registerForm.singerName+"-"+_this.registerForm.songName;
      songOfSongName(songOfName).then(
        res => {
          _this.addSong(res[0].id)
        }
      )
    },
    //添加歌曲
    addSong(songId){
      let _this = this;
      let params = new URLSearchParams();
      params.append('songId',songId);
      params.append('songListId',this.songListId);

      listSongAdd(params)
      .then(res => {
        if(res.code == 1){
            _this.getData();
            _this.notify("添加成功","success");
        }else{
            _this.notify("添加失败","error");
        }
      })
      .catch(err => {
        console.log(err);
      });
      _this.centerDialogVisible = false;
    },
    // 删除一个歌曲
    deleteRow() {
      delListSong(this.idx,this.songListId)
      .then(res => {
        if(res) {
          this.getData();
          this.notify("删除成功","success");
        } else {
          this.notify("删除失败","error");
        }
      })
      .catch(err => {
        console.log(err);
      }) 
      this.delVisible = false;
    },
  }
}
</script>
<style>
.handle-box {
  margin-bottom: 10px;
}
.handle-input{
    width: 300px;
    display: inline-block;
}
</style>